| Duluth to Conyers (Georgia) | 1,001.25 mi (1,611.35 km) |
| Duluth to Cookeville (Tennessee) | 809.80 mi (1,303.24 km) |
| Duluth to Coolidge (Arizona) | 1,396.96 mi (2,248.18 km) |
| Duluth to Coon Rapids (Minnesota) | 124.01 mi (199.58 km) |
| Duluth to Cooper City (Florida) | 1,572.46 mi (2,530.63 km) |
| Duluth to Coos Bay (Oregon) | 1,572.15 mi (2,530.13 km) |
| Duluth to Copiague (New York) | 1,023.40 mi (1,647.00 km) |
| Duluth to Coppell (Texas) | 987.85 mi (1,589.79 km) |
| Duluth to Copperas Cove (Texas) | 1,124.57 mi (1,809.83 km) |
| Duluth to Coral Gables (Florida) | 1,594.86 mi (2,566.69 km) |
| Duluth to Coral Springs (Florida) | 1,558.68 mi (2,508.45 km) |
| Duluth to Coral Terrace (Florida) | 1,591.36 mi (2,561.05 km) |
| Duluth to Coralville (Iowa) | 351.78 mi (566.14 km) |
| Duluth to Coram (New York) | 1,033.60 mi (1,663.42 km) |
| Duluth to Corcoran (California) | 1,589.68 mi (2,558.35 km) |
